|
|
|
| PREPARATION AND CHARACTERIZATION OF SmCo2 NANOCRYSTALLINE ALLOY WITH PERMANENT MAGNETIC PROPERTIES |
| LIANG Haining, SONG Xiaoyan, ZHANG Zhexu, LU Nianduan, LIU Xuemei, ZHANG Jiuxing |
| College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124 |
|
Cite this article:
LIANG Haining SONG Xiaoyan ZHANG Zhexu LU Nianduan LIU Xuemei ZHANG Jiuxing. PREPARATION AND CHARACTERIZATION OF SmCo2 NANOCRYSTALLINE ALLOY WITH PERMANENT MAGNETIC PROPERTIES. Acta Metall Sin, 2010, 46(8): 973-978.
|
|
|
Abstract The nanocrystalline SmCo2 bulk alloy with an average grain size of about 22 nm was prepared by combining high–energy ball milling and spark plasma sintering (SPS), in preparation the amorphous alloy powder obtained by milling was densified and crystallized during the SPS process. The microstructure, crystal structure and phase structure of such SmCo2 were determined. These results show that the nanocrystalline SmCo2 is not able to exist stably as a single phase at room emperature and decoposes into SmCo3 and Sm9Co4 phases, different from the conventional coarse–grained SmCo2 phase, which exiss stably at room temperature. Phase stability and transformation behavior have been explained by he nanocale thermodynamic simulation. Comparing with the coarse– grained SmCo2 with very weak magnetic properties, the nnocrystalline SmCo2 exhibits remarkable permanent magnetism and good overall magnetc properties.
|
|
Received: 16 March 2010
|
| Fund: Supported by National Natural Science Foundation of China (No.50871001) and Program for New Century Excellent Talent from The Ministry of Education of China (No.NCET–06–0182) |
| [1] Liu G H. Rare Earth Material Science. Beijing: Chemical Industry Press, 2007：13
(刘光华. 稀土材料学. 北京：化学工业出版社，2007：13)
[2] Zhou Z S. Rare-earth Permanent Magnetic Materials and Their Applications. Beijing: Metallurgical Industry Press, 1995: 219
(周寿增. 稀土永磁材料及其应用. 北京：冶金工业出版社，1995: 219)
[3] Buschow K H J, Der-Goot A S V. J Less Common Metals, 1968; 14: 323
[4] Nesbitt E A, Corenzwit E. J Appl Phys, 1959; 30: 365
[5] Lefevre A, Cohen-Adad M Th, Mentzen B F. Journal of Alloys and Compounds, 1997; 256: 207
[6] SONG X Y, LU N D, SEYRING M, et al. Appl Phys Lett. 2009; 94: 023102
[7] Song, X Y, Lu, N D, Xu, W W, Zhang, Z X, Zhang, J X. J Appl Cryst, 2009; 42: 691
[8] XU W W, SONG X Y, LI E D, et al. J Appl Phys. 2009; 105: 104310
[9] Song, X Y, Liu, X M, Zhang, J X J Am Ceram Soc, 2006; 89: 494
[10] Song, X Y, Zhang, J X, Yue, M, Li, E D, Zeng, H, Lu, N D, Zhou, M L, Zuo, T Y. Adv Mater, 2006; 18: 1210
[11] Zhang L D, Xie S Y. Nano Materials and Nano Structure. Beijing: Chemical Industry Press, 2005: 89
(张立德，解思深. 纳米材料与纳米结构. 北京：化学工业出版社，2005: 89)
[12] Song, X Y, Zhang, J X, Li, L M, Yang, K Y, Liu, G Q. Acta Mater, 2006; 54: 5541
[13] Xu, W W, Song, X Y, Lu, N D, Huang, C. Acta Mater, 2009; 58: 396
[14] Khan Y. Acta Crystallographica Section B, 1974; 30: 861
|
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
